As is customary, I seem to have answered my own question shortly after posting this thread. I believe that the geometry of the 2005 F15 is identical to the SC1. Until Felt gets their act together and fixes the broken links on their website, you can find a lot of older Felt geometry here:
http://www.google.com/search?hl=en&q...&aqi=&aql=&oq=
Just replace the search term with whatever model you need.